Figure 3. Pairwise multilocus FST heatmap forTshr haplotypes. FST values were calculated using the original method for estimation of genetic distance with correction for sample size bias (Nei, 1978). Colors indicate pairwise multilocus FST values ranging from 0 (yellow) to 1 (dark blue). Western and Eastern European populations are ordered from long to short predicted critical photoperiod (pCPP).